Convert the pixel lines Grease Pencil lines

I would like the line that draws on paper to become a line of Blender, but it becomes a surface of and cannot be easily corrected.

I have an idea how you could turn into a line in a line of Blender, using autotrace and Potrace. At Potrace make a surface with two lines per line drawn and autotrace that creates a central line both enters.

As I could analyze with the “GP clipboard” addons, Grease Pencil lines are saved as points with an array and sizes as another complementary array, so I thought of the following:

I just need a simple line like the one that generates “autotrace -centerline” and get the size similar to what is now used in blender, as I understand the vector of images is made with potrace.

more info | en castellano